noun (1), often capitalized, often attributive
\ ˈī How to pronounce i (audio) \
plural i's or is\ ˈīz How to pronounce i (audio) \

Definition of i

 (Entry 1 of 8)

1a : the 9th letter of the English alphabet
b : a graphic representation of this letter
c : a speech counterpart of orthographic i
2 : one — see Table of Numbers
3 : a graphic device for reproducing the letter i
4 : one designated i especially as the ninth in order or class
5 : something shaped like the letter I
6 : a unit vector parallel to the x-axis
7 [abbreviation for incomplete]
a : a grade rating a student's work as incomplete
b : one graded or rated with an I

Definition of i (Entry 2 of 8)

1 industrial
2 initial
3 intelligence
4 intensity
5 interlaced
6 intransitive
7 island; isle

Definition of i (Entry 3 of 8)

imaginary unit Imaginary numbers have an imaginary unit, like i, 4i, and -2i.— Yang Kuang and Elleyne Kase
\ ˈī How to pronounce I (audio) , ə \

Definition of I (Entry 4 of 8)

: the one who is speaking or writing I feel fine — compare me, mine, my, we
\ ˈī How to pronounce I (audio) \
plural I's or Is\ ˈīz How to pronounce I (audio) \

Definition of I (Entry 5 of 8)

: someone aware of possessing a personal individuality : self

Definition of I (Entry 6 of 8)

1 electric current
2 Indian
3 interstate
4 Israeli

Definition of I (Entry 7 of 8)




Definition of -i- (Entry 8 of 8)

used as a connective vowel to join word elements especially of Latin origin matrilinealraticide

me or I?: Usage Guide


Me is used in many constructions where strict grammarians prescribe I. This usage is not so much ungrammatical as indicative of the shrinking range of the nominative form: me began to replace I sometime around the 16th century largely because of the pressure of word order. I is now chiefly used as the subject of an immediately following verb. Me occurs in every other position: absolutely who, me? , emphatically me too , and after prepositions, conjunctions, and verbs, including be. come with me you're as big as me it's me Almost all usage books recognize the legitimacy of me in these positions, especially in speech; some recommend I in formal and especially written contexts after be and after as and than when the first term of the comparison is the subject of a verb.

Words Starting With I

Browse 11,385 words and phrases that start with the letter I, from iamb to izzat.

Examples of i in a Sentence

Noun (1) The word “ice” begins with an i. The word “ice” begins with i.

First Known Use of i

Noun (1)

before the 12th century, in the meaning defined at sense 1a


before the 12th century, in the meaning defined above

Noun (2)

1539, in the meaning defined above

History and Etymology for i


Middle English, from Old English ic; akin to Old High German ih I, Latin ego, Greek egō


Latin, thematic vowel of most nouns and adjectives in combination

Buying Guide

Check out the 11 best games for word lovers from our Reviews team.

Learn More About i

Time Traveler for i

Time Traveler

The first known use of i was before the 12th century

See more words from the same century

Dictionary Entries Near i




See More Nearby Entries 

Statistics for i

Last Updated

15 Apr 2022

Cite this Entry

“I.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/i. Accessed 24 May. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

More Definitions for i


noun, often capitalized
\ ˈī How to pronounce i (audio) \
plural i's or is\ ˈīz \

Kids Definition of i

1 : the ninth letter of the English alphabet
2 : the number one in Roman numerals


\ ˈī How to pronounce I (audio) , ə \

Kids Definition of I

: the person speaking or writing I am here.



Medical Definition of i

 (Entry 1 of 2)

1 incisor
2 optically inactive



Medical Definition of I (Entry 2 of 2)


More from Merriam-Webster on i

Nglish: Translation of i for Spanish Speakers

Britannica English: Translation of i for Arabic Speakers


Test Your Vocabulary

Eponyms: Words Named After People

True or False

Test your knowledge - and maybe learn something along the way.

Universal Daily Crossword

A daily challenge for crossword fanatics.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!